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Appendix. C. Thermal Management
1. Overview
1. Overview
• Since heat-sink design for the module would affect lifetime and performance of the module,
a heat-sink or luminaire should be designed with thermal considerations to smoothly
dissipate the thermal energy to the ambient.
• End product with the LED module should be designed in a manner which minimizes
the thermal resistance from the solder point to ambient in order to optimize the LED module
life and its optical characteristics
2. Heat sink Design guide
• The lifetime of the LED module cannot be guaranteed if operated without a heat-sink.
The heat-sink should be coupled with the module for thermal management as shown in Figure 9.
• Design of the heat-sink is one of the main factor which determines lifetime and performance
of the module. Hest-sink should be designed to keep the module temperature, Tc, under 70°C.
• Recommended material for the heat-sink is metals such as, Aluminum whose conductivity is
relatively higher and cheaper than other materials. In addition, surface treatment of the
heat-sink is important to increase the rate of heat-transfer. Powder coating and Anodizing
might be a good solution for the surface treatment of the heat-sink.
Figure.5 Assembly between Heat-sink(Al) and LED Module
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